Polymorphism

Association of novel single-nucleotide polymorphisms of the vascular endothelial growth factor-A gene with high-altitude adaptation in yak (Bos grunniens)

X. Y. Wu, Liang, C. N., Ding, X. Z., Guo, X., Bao, P. J., Chu, M., Liu, W. B., and Yan, P., Association of novel single-nucleotide polymorphisms of the vascular endothelial growth factor-A gene with high-altitude adaptation in yak (Bos grunniens), vol. 12, pp. 5506-5515, 2013.

Vascular endothelial growth factor-A gene (VEGF-A) is a key regulator of angiogenesis and an endothelial cell mitogen that plays an important role in high-altitude adaptation. In this study, we detected 2 novel single-nucleotide polymorphisms (SNPs) of VEGF-A by screening for genetic variation in 700 individuals of 3 domestic Chinese yak breeds - namely Gannan (GN), Datong (DT), and Tianzhu white (TZW) - using polymerase chain reaction-restriction fragment length polymorphism and DNA sequencing techniques.

Development and characterization of novel microsatellite markers in the rock bream fish Oplegnathus fasciatus

X. X. Sun, Xu, D. D., Lou, B., Li, S. L., Zhan, W., Zhang, Y. R., and Xin, J., Development and characterization of novel microsatellite markers in the rock bream fish Oplegnathus fasciatus, vol. 12, pp. 6462-6465, 2013.

The rock bream fish Oplegnathus fasciatus is one of the most popular aquaculture species in China. In the present study, 15 novel polymorphic microsatellite loci were isolated and characterized from a wild population of O. fasciatus from the Zhoushan coast of China. The number of alleles per polymorphic locus ranged from 4 to 9 in a sample of 30 individuals. Observed and expected heterozygosities per locus varied from 0.267 to 0.767 and from 0.395 to 0.859, respectively. Eleven of the 15 microsatellite loci conformed to Hardy-Weinberg equilibrium.

Contribution of catechol-O-methyltransferase Val158Met polymorphism to endometrial cancer risk in postmenopausal women: a meta-analysis

G. Lin, Zhao, J., Wu, J., R. O, A., Zhang, W. - H., Zhang, Y., and Yu, L., Contribution of catechol-O-methyltransferase Val158Met polymorphism to endometrial cancer risk in postmenopausal women: a meta-analysis, vol. 12, pp. 6442-6453, 2013.

Catechol-O-methyltransferase (COMT) is a critical enzyme to detoxify the carcinogenic catechol estrogen and the Val158Met polymorphism of COMT could influence its enzymatic activity. Recent epidemiological studies have investigated the correlation of COMT Val158Met polymorphism with endometrial cancer risk; however, the results are inconsistent. To better evaluate the role of COMT Val158Met in endometrial carcinogenesis, we performed this meta-analysis, considering menopausal status, study quality, ethnicity, and source of controls.

Isolation and characterization of novel microsatellite loci in Nibea albiflora

D. D. Xu, Lou, B., Li, S. L., Zhang, Y. R., Xin, J., and Zhan, W., Isolation and characterization of novel microsatellite loci in Nibea albiflora, vol. 12, pp. 6156-6159, 2013.

Eleven novel microsatellite loci were isolated from a (CA)10-enriched genomic DNA library of Nibea albiflora. The characteristics of these microsatellites were determined in a sample of 48 N. albiflora individuals. The number of alleles at the 11 microsatellite loci ranged from 5 to 25, with an average of 13.5 per locus. The observed and expected heterozygosities varied from 0.583 to 0.917 and from 0.568 to 0.964, respectively. Eight of the 11 microsatellite loci conformed to the Hardy-Weinberg equilibrium.

Comparative sodium dodecyl sulfate-polyacrylamide gel electrophoresis and restricted fragment length polymorphism among fenugreek accessions

E. A. Haliem and Al-Huqail, A. A., Comparative sodium dodecyl sulfate-polyacrylamide gel electrophoresis and restricted fragment length polymorphism among fenugreek accessions, vol. 12, pp. 6284-6298, 2013.

Protein and DNA polymorphismswere surveyed among seven accessions of wild fenugreek (Trigonellafoenum-graecum L.) to estimate their genetic diversity and relationships. Samples were obtained from diverse ecogeographical areas in Saudi Arabia and Yemen. Sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) analysis of seed storage protein showed genetic variations among fenugreek germplasms, both quantitatively and qualitatively, generating a total of 168 polypeptide bands with different molecular weights ranging from 4.5 to 300 kDa.

Lack of association between Cyclin D1 gene G870A polymorphism and esophageal cancer: evidence from a meta-analysis

W. Cai, Wang, Z. T., Zhong, J., and Zhang, Y., Lack of association between Cyclin D1 gene G870A polymorphism and esophageal cancer: evidence from a meta-analysis, vol. 12, pp. 6636-6645, 2013.

The association between the Cyclin D1 gene (CCND1) G870A polymorphism and esophageal cancer has been widely evaluated, with conflicting results. As meta-analysis is a reliable approach to resolving discrepancies, we aimed to evaluate this association. Data were available from 9 study populations incorporating 1898 cases and 3046 controls.

Genetic polymorphisms of the IGF-II gene intron 8 coding region and its association with growth and carcass traits in yak

Y. F. Zeng, Ding, X. Z., Cheng, S. R., and Yu, S. J., Genetic polymorphisms of the IGF-II gene intron 8 coding region and its association with growth and carcass traits in yak, vol. 12, pp. 6602-6610, 2013.

Insulin-like growth factor II (IGF-II) plays a key role in mammalian growth and is involved in stimulating fetal cell division, differentiation, and metabolic regulation. IGF-II is considered a candidate gene for genetic markers of growth and carcass traits. Therefore, in this study, the associations of single nucleotide polymorphisms (SNPs) in the IGF-II gene region with growth and carcass characteristics in five yak breeds were investigated. Two SNPs, G330C and A358G, were identified by sequencing intron 8 of the IGF-II gene in homozygotes.

Influence of the human MIF promoter polymorphism on hepatocellular carcinoma prognosis

T. Yuan, Tang, C., Chen, M., Deng, S., and Chen, P., Influence of the human MIF promoter polymorphism on hepatocellular carcinoma prognosis, vol. 12, pp. 6629-6635, 2013.

Hepatocellular carcinoma (HCC) is one of the most common worldwide malignancies. A relative complete diagnosis system for primary carcinoma of liver has already been established, but the surgical prognosis for HCC, which depends mainly on postoperative pathological classification and data of recurrence and metastasis, lacks valid experimental indicators. Macrophage migration inhibition factor (MIF) is related to many cancers; hence, the polymorphism of MIF genes may be associated with the surgical prognosis of HCC.

Genetic polymorphisms of CCND1 and PTEN in progression of esophageal squamous carcinoma

Y. Jang, Lu, S. A., Chen, Z. P., Ma, J., Xu, C. Q., Zhang, C. Z., and Wang, J. J., Genetic polymorphisms of CCND1 and PTEN in progression of esophageal squamous carcinoma, vol. 12, pp. 6685-6691, 2013.

Cyclin D1 (CCND1) plays a significant role in G1-S transition of cell cycle, and phosphatase and a tensin homologue (PTEN) negatively regulate cell cycle through phosphatidylinositol 3-kinase (PI3K)/AKT signaling. CCND1 and PTEN genetic polymorphisms might induce susceptibility to the occurrence of esophageal squamous cell carcinoma (ESCC). Three hundred and four ESCC patients and 413 healthy controls from Anyang, China, were enrolled in this study.

Association of the methylenetetrahydrofolate reductase gene A1298C polymorphism with stroke risk based on a meta-analysis

Q. Q. Lv, Lu, J., Wu, W., Sun, H., and Zhang, J. S., Association of the methylenetetrahydrofolate reductase gene A1298C polymorphism with stroke risk based on a meta-analysis, vol. 12, pp. 6882-6894, 2013.

Several independent studies have reported the role of the methylenetetrahydrofolate reductase gene (MTHFR) A1298C polymorphism in strokes, but the results are inconclusive. To derive a more precise estimation of the relationship, a meta-analysis was performed in the present study. In this meta-analysis, a total of 13 studies, including 1974 cases and 2660 controls, were selected to evaluate the possible association. Crude odds ratios (ORs) with 95% confidence intervals (CI) were used to assess the strength of the association in additive, dominant, and recessive models.

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